The reward for information leading to an arrest and indictment in a double-shooting homicide Friday evening near Westlake High School has tripled to $15,000, thanks to a donation from The St. Charles Cos. and Hampshire Neighborhood Association.

Teresa Ann Bass, 40, and her husband, 43, were walking their dog on a leash along a path connecting the school’s baseball field and the Hampshire neighborhood around 6:45 p.m. Friday when they passed a man who, for unknown reasons, pulled out a gun and shot them both multiple times, Charles County Sheriff's Office spokeswoman Diane Richardson said.

Sheriff’s officers working security at the Westlake-Great Mills football game heard the gunshots and were on the scene within a minute, Richardson said.

Bass was taken by ambulance to Civista Medical Center in La Plata, where she died from her injuries, Richardson said. Her husband, whose name police will not release, was flown to a nearby hospital and remains listed with serious injuries.

Officers canvassed the Hampshire neighborhood for possible witnesses and remained there overnight, resuming their search for evidence along the path Saturday morning, Richardson said. They spent the weekend stopping cars entering and leaving Hampshire, and handed drivers fliers seeking information on the case.

The sheriff’s office also made reverse 911 calls alerting nearby residents of the shooting, Richardson said.

Investigators are pursuing leads and have not identified a motive for the shooting, but they do have a “vague” description of the suspect, Richardson said — a black male with a light complexion, possibly in his teens or early 20s.

“Our focus now is trying to run down leads,” Richardson said. “We absolutely need to hear from anybody who has any information. If they have an idea as to who may have done it, any information, we will follow up on it.”

Immediately after the shooting, Charles County Sheriff Rex Coffey (D) authorized an increase in the reward for information leading to an arrest and indictment in the case from $1,000 to $5,000. On Monday, The St. Charles Cos., working in coordination with the Hampshire Neighborhood Association and its management agent, Property Management Enterprises, contributed $10,000 to the reward.

“Anyone who knows our agency knows we will leave no stone unturned and will pursue every investigative lead to identify the suspect,” Coffey said in a statement. “We hope the increase in the reward will generate tips, and we strongly encourage anyone with information to call our detectives or the Crime Solvers line. Callers can remain anonymous.”

Anyone with information should call the sheriff’s office at 301-932-2222. Those wishing to remain anonymous may call Crime Solvers at 866-411-TIPS, text CHARLES + your tip to CRIMES or go to www.ccso.us to submit a tip online.